Single-path three-axis magnetic information detection method and system based on diamond NV color center

Abstract

The invention discloses a single-path three-axis magnetic information detection method and system based on a diamond NV color center. Under the action of laser and microwave swept-frequency signals, the diamond NV color center generates fluorescence, an optical signal acquired by a photoelectric detector is converted into an electric signal, and the ODMR spectrum of the diamond NV color center isobserved on an oscilloscope; the position of a magnet near the diamond is then adjusted; an ODMR spectrum for generating four pairs of peak values is obtained; frequency division regulation and control are performed on the microwave control module through the PC, four paths of microwave frequency signals of the single-side ODMR, which are output at equal frequency difference and equal time sequence, are generated; the data acquisition software acquires and records the signalas an initial value, changes the size of an external magnetic field, repeats the data acquisition step, compares the acquired new data with the initial value, performs electromagnetic information conversion and three-axis magnetic information calculation, and finally a final magnetic field change result is outputted bythe PC. The detection method is simple and convenient, large-scale experimental equipment and space are saved, and the experimental efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of quantum sensing, and specifically relates to a diamond NV color center magnetic field detection technology to realize the detection of single-channel three-axis magnetic field information. Background technique [0002] With the development of modern science and technology, weak magnetic field measurement technology plays an indispensable role in many important fields such as biomedicine, military engineering, resource survey and space exploration. For example, nuclear magnetic resonance technology in biomedicine, degaussing, submarine detection, torpedo guidance and satellite ranging, aeromagnetic, and geomagnetic measurements in military ships all use weak magnetic measuring instruments. High-precision weak magnetic measuring instruments are resource exploration main equipment. Moreover, magnetic field-weakening detection technology is a hot spot in high-tech today. The development of high-performance, ...

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Problems solved by technology

[0005] Based on the current method of using the diamond NV color center to detect the vector magnetic field, it is necessary to observe and process the four axial four-way ODMR signals of the diamond NV color center during data analysis and processing. The process operation is relatively complicated, so the design of the present invention A single-channel signal output method for the four axial signals of the diamond NV color center is proposed, and the three-axis vector magnetic information is directly calculated for the experimental results, and the final magnetic field vector results are obtained, which simplifies the experimental steps and saves experiments. instrument, which improves the efficiency of the experiment

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